For example, to make the Exchange ActiveSync plugin fully verbose, first
ensure that journald won't throttle logging output (see the notes on
editing /etc/systemd/journald.conf above) and then ensure that the
/home/nemo/.config/eas-sailfish.conf file contains the following:

Some processes can be made more verbose by installing specific "tracing"
packages which configure the service to be more verbose when installed
(via devel-su pkcon install <pkgname>). Some examples include:

connman-tracing
bluez5-tracing
connectionagent-qt5-tracing

Home Screen and Compositor diagnostics

Lipstick debugs can be enabled by adding LIPSTICK\_COMPOSITOR\_DEBUG=1
to /var/lib/environment/compositor/\*.conf.

Now restart lipstick and you have a small box at the bottom of the
screen for debugging the top most window. "Dump" button outputs data of
the top most window to the journal. "Expose" button shows current
windows.

In case screen is locked or/and touch is not responding but you have an
access to the device. Top most window can be dumped like: